/Engine/Source/Editor/Sequencer/Public/MVVM/ViewModels/ChannelModel.h
Get the key areas of all channels
[TArray](API\Runtime\Core\Containers\TArray)< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IKeyArea](API\Editor\Sequencer\IKeyArea) > > GetAllKeyAreas() const